package com.atguigu.lease.web.admin.service.impl;

import com.atguigu.lease.common.constant.RedisConstant;
import com.atguigu.lease.common.exception.LeaseException;
import com.atguigu.lease.common.result.ResultCodeEnum;
import com.atguigu.lease.common.utils.JwtUtil;
import com.atguigu.lease.model.entity.SystemUser;
import com.atguigu.lease.model.enums.BaseStatus;
import com.atguigu.lease.web.admin.mapper.SystemUserMapper;
import com.atguigu.lease.web.admin.service.LoginService;
import com.atguigu.lease.web.admin.vo.login.CaptchaVo;
import com.atguigu.lease.web.admin.vo.login.LoginVo;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.wf.captcha.SpecCaptcha;
import org.apache.commons.codec.digest.DigestUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;

import java.util.UUID;
import java.util.concurrent.TimeUnit;

@Service
public class LoginServiceImpl implements LoginService {
    @Autowired
    private StringRedisTemplate redisTemplate;
    @Autowired
    private SystemUserMapper systemUserMapper;

    /*
     * easy-captcha -->生成图形验证码的方法
     */
    @Override
    public CaptchaVo getCaptcha() {
        //图片对象SpecCaptcha（设置图片样式）
        SpecCaptcha specCaptcha = new SpecCaptcha(130, 48, 5);
        //验证码
        String verCode = specCaptcha.text().toLowerCase();

        //redis保存verCode验证码
        String key = RedisConstant.ADMIN_LOGIN_PREFIX +UUID.randomUUID();
        redisTemplate.opsForValue().set(key, verCode, RedisConstant.ADMIN_LOGIN_CAPTCHA_TTL_SEC, TimeUnit.SECONDS);

        //把图形验证码，和redis保存验证码的key进行封装
        CaptchaVo captchaVo = new CaptchaVo(specCaptcha.toBase64(),key);
        return captchaVo;
    }

    @Override
    public String login(LoginVo loginVo) {

        //获取用户输入的验证码
        String captchaCode = loginVo.getCaptchaCode();
        if(!StringUtils.hasText(captchaCode)){
            throw new LeaseException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_NOT_FOUND);
        }

        //获取redis中保存的验证码
        String redisCode = redisTemplate.opsForValue().get(loginVo.getCaptchaKey());
        if(redisCode==null){
            throw new LeaseException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_EXPIRED);
        }

        //验证码校验
        if(!captchaCode.equals(redisCode)){
            throw new LeaseException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_ERROR);
        }

        //根据账号查询数据库用户的信息
        SystemUser systemUser = systemUserMapper.selectOne(new LambdaQueryWrapper<SystemUser>().eq(SystemUser::getUsername, loginVo.getUsername()));
        if(systemUser==null){
            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_NOT_EXIST_ERROR);
        }

        //判断账号状态
        if(systemUser.getStatus()== BaseStatus.DISABLE){
            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_DISABLED_ERROR);
        }

        //密码校验
        if(!systemUser.getPassword().equals(DigestUtils.md5Hex(loginVo.getPassword()))){
            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_ERROR);
        }

        //登录成功，生成token
        String token = JwtUtil.createToken(systemUser.getUsername(), systemUser.getId());


        return token;
    }
}
